Surging Idle
#1
Racer
Thread Starter
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My 2008 TL-S has a surging idle. It normally idles at 800 rpm, but every 7 to 15 seconds surges to 1100 and then immediately back to 800 rpm. Does this even with the AC off.
It appeared to start after I removed and reinstalled the IMT (intake maniforld tuning) valve actuator located above the power steering pump. Tried reinstalling the actuator with the gears in different positions but no change.
Also tried the idle learn procedure.
Any idea what could be causing this?
It appeared to start after I removed and reinstalled the IMT (intake maniforld tuning) valve actuator located above the power steering pump. Tried reinstalling the actuator with the gears in different positions but no change.
Also tried the idle learn procedure.
Any idea what could be causing this?
#4
Team Owner
Yes, Seafoam will reinstall something that was installed wrong or help the ECU learn quicker.
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paperboy42190 (03-17-2013)
#6
Suzuka Master
I just had the same thing happen with our Odyssey. it was the idle air control valve. while it is doing that surge disconnect the IACV and wait a moment. shut off and reconnect. then restart. you will now have a check engine light but hopefully the IACV will have been reset and all will be good. if it keeps coming back you may need to replace valve.
make sure your radiator is topped off. that can trigger the surge as well
not even sure the TL has an IACV but just sayin
make sure your radiator is topped off. that can trigger the surge as well
not even sure the TL has an IACV but just sayin
Last edited by pohljm; 03-16-2013 at 04:29 PM.
#7
Team Owner
Air in the coolant? Nope. If an 02 is so bad as to cause a surge you'll likely have a code and a light.
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#9
Pro
I just had the same thing happen with our Odyssey. it was the idle air control valve. while it is doing that surge disconnect the IACV and wait a moment. shut off and reconnect. then restart. you will now have a check engine light but hopefully the IACV will have been reset and all will be good. if it keeps coming back you may need to replace valve.
make sure your radiator is topped off. that can trigger the surge as well
not even sure the TL has an IACV but just sayin
make sure your radiator is topped off. that can trigger the surge as well
not even sure the TL has an IACV but just sayin
#11
Fellas,
I've had something similar happen after I had my runners and IM ported and polished.
The car starts and idles fine but on cold starts the idle will surge up to about 11-1200 only when placed into drive. It will even stay there and roll out of the neighborhood. I've noticed it slightly surge when warm but it's not as apparent.
I don't get any codes so am thinking it's a slight vacuum leak. I've had my check fuel cap warning come up twice in the last few months too. Any ideas?
I've had something similar happen after I had my runners and IM ported and polished.
The car starts and idles fine but on cold starts the idle will surge up to about 11-1200 only when placed into drive. It will even stay there and roll out of the neighborhood. I've noticed it slightly surge when warm but it's not as apparent.
I don't get any codes so am thinking it's a slight vacuum leak. I've had my check fuel cap warning come up twice in the last few months too. Any ideas?
#14
#15
Can you elaborate bud; do you think it's from the PnP work?
I had the runners and IM PnP'd about a year ago and haven't had an issue until 9-10 months afterwards when the fuel cap warning came on.
I was thinking maybe that plastic IM gasket loosened up over time with heat and needs tightening. I'll have to take a look over the weekend.
Cars under extended warranty but stealership wants to troubleshoot it first saying the fuel cap isn't covered under warranty but other portions of the evap system are.
I had the runners and IM PnP'd about a year ago and haven't had an issue until 9-10 months afterwards when the fuel cap warning came on.
I was thinking maybe that plastic IM gasket loosened up over time with heat and needs tightening. I'll have to take a look over the weekend.
Cars under extended warranty but stealership wants to troubleshoot it first saying the fuel cap isn't covered under warranty but other portions of the evap system are.
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